A person who is easy-going, fun to be with, sexy, capable, daring, sassy, lovable, loves to smile, able to laugh at anything including themselves, loves to joke around and know the value of fun. She is a person who doesn't take life seriously yet can cheer you up anytime. Also a type of person who will try to help those in any way they can.

But not a person to be messed with because she will go all out to get back at someone.

Danny: Dude, what do you think of the new transfer
student?
James: Woah! She's a sapphire alright.

Sapphire is a type of corundum. It occurs in every color except red, because red corundum is ruby. It is actually more durable than diamond, even though diamond can't be scratched. Durability in this case refers to corundum's ability to withstand wear and tear.

Some sapphires grow in the earth in such a way that when they are cut cabochon style (which is basically a smooth, domed shape), they display a six-rayed star that moves around as the stone is moved around a fixed light source. This is refered to as "asterism".

a girlfriend of a member of the crips gang, from the gang color (blue); compare "ruby red," meaning a girlfriend of a member of the bloods, whose gang color is red (data from 2007 high school girls in east new york, brooklyn)